I understand completely where you are. I have a black lab myself Avery is 20 years old and for whatever reason still gets up every morning. Just last week I took her in for her annual evaluation, and with the exception of a slight heart murmur the doc says there is nothing wrong with here. She has no cataracts, and still has selective hearing. He told me the argument for putting her down is the same as keeping her alive. He said 'Let's see how far she takes us'. I can't tell you how glad I was to hear that. Because you guys have now made it impossible for me to see my screen, I can't begin to think how my heart is going to break when she has to go. She has always been everything I wanted in a dog. I count myself lucky to be graced with her life...Okay, I'm going now, I need a towel.